thingy /ˈθɪŋiː/noun 2adjective 1pronoun 1forms 3 noun2 •(informal) A thing (used to refer to something vaguely or when one cannot recall or does not wish to mention its name).And as soon as that temperature returns to normal, let’s talk about the thingies that go through your headie at night. — 1996 •(slang, euphemistic) A penis.He pulled out his thingy. It was huge. — 2004 adjective1 •Resembling or characteristic of a thing; tangible.The secret of even the thingiest SF, the most solid-walnut-to-the-knuckles fantasy, is that you don't need much to summon worlds out of air, so long as the details are the right ones. — 2017 pronoun1 •(informal) A person whose name one cannot recall.He reminds me of thingy from that film. formsthingies · thingier · thingiest